Tolong batuin... besok sudah dikumpulin.. mohon bantuannya >_<

9) KL = √(KM² - LM²)
= √((2√13)² - 4²)
= √(52 - 16)
= √36
= 6
cos K = samping/miring
= 6/(2√13)
= 3/√13 . √13/√13
= (3/13) √13

8) samping = √(p² - 5²)
= √(p² - 25)

cos ¤ = sa/mi
2/3 = √(p² - 25) /p
2p = 3√(p² - 25)
(2p)² = (3√(p² - 25))²
4p² = 9(p² - 25)
4p² = 9p² - 225
-5p² = -225
p² = 45
p = √45
p = 3√5